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A179232 Numbers in A075728 which are not one less than some prime. 1
120, 186, 264, 450, 504, 552, 696, 978, 1208, 1440, 1444, 1848, 2034, 2744, 4320, 4410, 5376, 6888, 7020, 9264, 9968, 10944, 10989, 13952, 16080, 19152, 23160, 29280, 31410, 34464, 38928, 39648, 49544, 56880, 60480, 67266, 73200, 78480, 82800, 91440, 102312 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The 30 first terms of A075728 are equal to prime(k)-1 for some k. The first term here, n = 120, satisfies |sigma(n) - 2*n| = n. - Michel Marcus, Nov 02 2013

LINKS

Donovan Johnson, Table of n, a(n) for n = 1..1000

FORMULA

A075728 \ A006093.

PROG

(PARI) lista(nn) = {rec = -1; for (n=1, nn, d = abs(sigma(n) - 2*n); if (d > rec, if (! isprime(d+1), print1(d, ", ")); rec = d; ); ); } \\ Michel Marcus, Nov 02 2013

CROSSREFS

Cf. A006093, A075728.

Sequence in context: A279088 A322377 A247851 * A056994 A288461 A114823

Adjacent sequences:  A179229 A179230 A179231 * A179233 A179234 A179235

KEYWORD

nonn

AUTHOR

Artur Jasinski, Jul 04 2010

EXTENSIONS

More terms from R. J. Mathar, Jul 05 2010

A-number typo corrected by R. J. Mathar, Jul 16 2010

STATUS

approved

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Last modified November 15 11:18 EST 2019. Contains 329144 sequences. (Running on oeis4.)