A287746 First differences of A154293.

1, 5, 5, 2, 7, 15, 11, 4, 13, 25, 17, 6, 19, 35, 23, 8, 25, 45, 29, 10, 31, 55, 35, 12, 37, 65, 41, 14, 43, 75, 47, 16, 49, 85, 53, 18, 55, 95, 59, 20, 61, 105, 65, 22, 67, 115, 71, 24, 73, 125, 77, 26, 79, 135, 83, 28, 85, 145, 89, 30, 91, 155, 95, 32, 97, 165, 101, 34, 103, 175

Offset

1,2

Links

Table of n, a(n) for n=1..70.

Formula

a(n) = A287733(n)/6.

Mathematica

Select[Accumulate[Range[0, 300]]/6, IntegerQ]//Differences (* Harvey P. Dale, Feb 20 2020 *)

Crossrefs

Cf. A069497, A108782, A154293, A287733.

Sequence in context: A322159 A023580 A021648 * A377804 A377751 A128006

Adjacent sequences: A287743 A287744 A287745 * A287747 A287748 A287749

Keyword

nonn

Author

Greg Huber, May 31 2017

Status

approved