Some relations in numbers, mainly OEIS

Software used:

2010.09.01: nonlinear, doubling a(2k), a(2k+1) _____ database
2010: linear relations among seqs. (1)
2010: 3 sequence relations (160K rels) _____ database
2010: 3 sequence relations addjusting offset (1.2M rels)_____ database