A256971 Partial sums of A256970.

5, 22, 59, 64, 165, 170, 367, 624, 629, 1030, 1035, 1612, 2289, 2294, 2311, 2316, 2329, 3626, 3631, 5232, 5237, 5250, 5279, 5284, 5325, 5330, 8247, 11384, 11389, 11402, 11407, 11424, 15781, 15786, 15799, 15804, 21281, 21334, 21339, 21376

Offset

1,1

References

Richard Friedberg, An Adventurer's Guide to Number Theory, McGraw-Hill, NY, 1968.

Popular Computing (Calabasas, CA), Friedberg's Sequence, Vol. 5 (No. 46, Jan 1977), page PC46-2.

Links

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

Mathematica

Accumulate[Table[FactorInteger[4*n^2+1][[1, 1]], {n, 40}]] (* Ivan N. Ianakiev, Apr 20 2015 *)

Prog

(Haskell)
a256971 n = a256971_list !! (n-1)
a256971_list = scanl1 (+) a256970_list

Crossrefs

Cf. A053755, A256970.

Sequence in context: A033445 A208946 A245301 * A273685 A050533 A212094

Adjacent sequences: A256968 A256969 A256970 * A256972 A256973 A256974

Keyword

nonn

Author

N. J. A. Sloane, Apr 19 2015

Status

approved