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A084370 Convolution of odd primes with themselves. 1
9, 30, 67, 136, 237, 386, 587, 852, 1213, 1658, 2227, 2932, 3765, 4766, 5939, 7324, 8917, 10746, 12851, 15200, 17845, 20794, 24083, 27748, 31785, 36250, 41107, 46376, 52113, 58350, 65111, 72444, 80353, 88858, 98003, 107744, 118201, 129410, 141355 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

EXAMPLE

a(4)=11*3+7*5+5*7+3*11=136

MATHEMATICA

Table[With[{c=Prime[Range[2, n]]}, ListConvolve[c, c]], {n, 2, 40}]//Flatten (* Harvey P. Dale, Apr 25 2016 *)

PROG

(PARI) conv(n)=local(v, s); v=primes(n); s=0; for(i=2, length(v), s+=v[i]*v[length(v)-i+2] ); s for(n=1, 40, print1(conv(n)", "))

CROSSREFS

Cf. A014342.

Sequence in context: A073399 A225275 A005919 * A000439 A002414 A273604

Adjacent sequences:  A084367 A084368 A084369 * A084371 A084372 A084373

KEYWORD

nonn

AUTHOR

Jon Perry, Jun 23 2003

STATUS

approved

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Last modified August 11 00:32 EDT 2020. Contains 336403 sequences. (Running on oeis4.)