

A227863


Numbers congruent to {1,49} mod 120.


1



1, 49, 121, 169, 241, 289, 361, 409, 481, 529, 601, 649, 721, 769, 841, 889, 961, 1009, 1081, 1129, 1201, 1249, 1321, 1369, 1441, 1489, 1561, 1609, 1681, 1729, 1801, 1849, 1921, 1969, 2041, 2089, 2161, 2209, 2281, 2329, 2401, 2449, 2521, 2569, 2641, 2689
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OFFSET

1,2


COMMENTS

The squares of natural numbers not divisible by 2, 3 or 5 and therefore the squares of prime numbers >5 are confined to this sequence.


LINKS



FORMULA

G.f.: x*(1 + 48*x + 71*x^2)/((1 + x)*(1  x)^2). [Bruno Berselli, Nov 04 2013]
E.g.f.: 71 + (60*x  65)*exp(x)  6*exp(x).  David Lovler, Sep 10 2022


MATHEMATICA

Table[60 n  6 (1)^n  65, {n, 50}] (* Bruno Berselli, Nov 04 2013 *)


PROG



CROSSREFS



KEYWORD

nonn,easy


AUTHOR



STATUS

approved



