A163983 Antidiagonal sums of A163280.

1, 6, 18, 41, 77, 133, 210, 310, 445, 602, 810, 1049, 1347, 1693, 2068, 2545, 3028, 3613, 4256, 4987, 5817, 6711, 7640, 8783, 9962, 11157, 12454, 13992, 15615, 17310, 19194, 21113, 23108, 25325, 27852, 30412, 33158, 36019, 38920, 41877, 45230, 48686, 52528, 56593, 60399, 64406

Offset

1,2

Links

Table of n, a(n) for n=1..46.

Prog

(PARI) lista(nn) = my(v = apply(f, [1..nn^2]), cols = vector(nn, i, select(x->(x==i), v, 1))); vector(nn, i, sum(j=1, i, cols[j][i-j+1])); \\ Michel Marcus, Jan 23 2023

Crossrefs

Cf. A163280, A161344, A164000.

Sequence in context: A299263 A374339 A015224 * A191829 A023620 A074837

Adjacent sequences: A163980 A163981 A163982 * A163984 A163985 A163986

Keyword

nonn

Author

Omar E. Pol, Aug 08 2009

Extensions

More terms from Michel Marcus, Jan 23 2023

Definition corrected by Omar E. Pol, Jan 24 2023

Status

approved