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A024522 a(n) = 2nd elementary symmetric function of {1, p(1), p(2), ..., p(n-1)}, where p(0) = 1. 0
2, 11, 41, 118, 316, 693, 1407, 2528, 4322, 7251, 11281, 17238, 25356, 35633, 48887, 66324, 88862, 115763, 149397, 189796, 236516, 292843, 358579, 436454, 529962, 637123, 756809, 892164, 1041712, 1209065, 1411503, 1636954, 1890678, 2167149, 2484221, 2828048 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

Table of n, a(n) for n=2..37.

MAPLE

b:= proc(n) option remember; convert(series(`if`(n=0, 1, b(n-1)*

     (`if`(n=1, 1, ithprime(n-1))*x+1)), x, 3), polynom)

    end:

a:= n-> coeff(b(n), x, 2):

seq(a(n), n=2..40);  # Alois P. Heinz, Sep 08 2019

CROSSREFS

Cf. A000040.

Sequence in context: A066593 A173580 A062256 * A144841 A203245 A121244

Adjacent sequences:  A024519 A024520 A024521 * A024523 A024524 A024525

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified January 27 10:39 EST 2022. Contains 350607 sequences. (Running on oeis4.)