Pair the odd numbers such that the k-th pair is (r, r+2k) where r is the smallest odd number not included earlier: (1, 3), (5, 9), (7, 13), (11, 19), (15, 25), (17, 29), (21, 35), (23, 39), (27, 45), ... This is the sequence of the product of the members of pairs.
A075320
Pair the odd numbers such that the k-th pair is (r, r+2k) where r is the smallest odd number not included earlier: (1, 3), (5, 9), (7, 13), (11, 19), (15, 25), (17, 29), (21, 35), (23, 39), (27, 45), ... This is the sequence of the product of the members of pairs.
Terms
- a(0) =3a(1) =45a(2) =91a(3) =209a(4) =375a(5) =493a(6) =735a(7) =897a(8) =1215a(9) =1581a(10) =1815a(11) =2257a(12) =2747a(13) =3053a(14) =3619a(15) =3969a(16) =4611a(17) =5301a(18) =5723a(19) =6489a(20) =6955a(21) =7797a(22) =8687a(23) =9225a(24) =10191a(25) =11205a(26) =11815a(27) =12905a(28) =13559a(29) =14725
External references
- oeis: A075320