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A115619 Sigma(A033631(n)) {sigma is the sum of divisors function A000203}. 2
1, 120, 546, 1680, 2880, 7812, 14520, 34200, 40320, 40320, 53760, 68796, 63360, 76608, 78624, 80640, 89280, 86400, 95040, 90720, 129600, 178560, 155496, 205920, 214272, 190080, 223200, 245520, 241920, 244800, 267840, 280800, 259200, 312480, 345600, 313560, 393120, 374976, 401760, 367200, 464256 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

T. D. Noe, Table of n, a(n) for n = 1..1000

PROG

(PARI) for(n=1, 1e6, if(sigma(eulerphi(n))==sigma(n), print1(sigma(n)", "))) \\ Charles R Greathouse IV, Feb 19 2013

CROSSREFS

Sequence in context: A221563 A336626 A241613 * A152622 A100145 A234437

Adjacent sequences:  A115616 A115617 A115618 * A115620 A115621 A115622

KEYWORD

nonn

AUTHOR

Lekraj Beedassy, Jan 26 2006

STATUS

approved

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Last modified November 30 05:12 EST 2021. Contains 349419 sequences. (Running on oeis4.)