A279397 Row sums of triangle A279396.

1, 1, 4, 9, 25, 69, 217, 745, 2801, 11399, 49859, 232639, 1151397, 6017345, 33084489, 190780154, 1150686536, 7241926820, 47455774001, 323158817943, 2282794174761, 16700943712871, 126356690691651, 987303203599953, 7957130740261570, 66071751478724210, 564631175841553564, 4961038559732049506, 44775183035039043106

Offset: 1

Author

Wolfdieter Lang, Jan 10 2017

Keywords

• nonn
• easy

References

• G. H. Hardy, Ramanujan: twelve lectures on subjects suggested by his life and work, AMS Chelsea Publishing, Providence, Rhode Island, 2002, p. 142.

Crossrefs

Cf. A279395, A279396.

Formula

a(n) = Sum_{m=1..n} A279396(n, m) =

Sum_{m=1..n} sigma^*_{n-m}(m), n >= 1, with the definition of sigma^*_k(n) given in the Hardy reference or in a comment in A279395.