

A092406


a(n)=sigma(n) if sigma(n)>=a(n1), else a(n)=a(n1)+sigma(n).


0



1, 3, 4, 7, 13, 25, 33, 48, 61, 79, 91, 119, 133, 157, 181, 212, 230, 269, 289, 331, 363, 399, 423, 483, 514, 556, 596, 652, 682, 754, 786, 849, 897, 951, 999, 1090, 1128, 1188, 1244, 1334, 1376, 1472, 1516, 1600, 1678, 1750, 1798, 1922, 1979, 2072, 2144, 2242
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OFFSET

1,2


COMMENTS

Does a(n)=sigma(n) only for n=1,2,3,4?


LINKS

Table of n, a(n) for n=1..52.


PROG

(PARI) { v=vector(60); v[1]=sigma(1); for (i=2, 60, if (sigma(i)<v[i1], v[i]=v[i1]+sigma(i), v[i]=sigma(i))); v }


CROSSREFS

Cf. A000203.
Sequence in context: A189994 A125118 A116201 * A121174 A050071 A041002
Adjacent sequences: A092403 A092404 A092405 * A092407 A092408 A092409


KEYWORD

nonn


AUTHOR

Jon Perry, Mar 22 2004


STATUS

approved



