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 A028300 a(1) = 1; thereafter a(n+1) = a(n)^2 + n. 6
 1, 2, 6, 39, 1525, 2325630, 5408554896906, 29252466072845872288372843, 855706771342998810018458679815602502067088579902657 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Indranil Ghosh, Table of n, a(n) for n = 1..13 FORMULA a(n) ~ c^(2^n), where c = 1.2574108318043003098123273077302829405940294604970047023808427877694426442... . - Vaclav Kotesovec, Dec 18 2014 EXAMPLE a(3) = a(2)^2+2 = 4+2 = 6. MATHEMATICA a=1; lst={}; Do[a=a^2+n; AppendTo[lst, a], {n, 0, 12}]; lst (* Vladimir Joseph Stephan Orlovsky, Dec 17 2008 *) RecurrenceTable[{a[1] == 1, a[n+1] == a[n]^2 + n}, a, {n, 1, 10}] (* Vaclav Kotesovec, Dec 18 2014 *) CROSSREFS Cf. A153058, A153059, A086851, A153060, A098152. Sequence in context: A211348 A295912 A120492 * A068207 A288491 A212883 Adjacent sequences:  A028297 A028298 A028299 * A028301 A028302 A028303 KEYWORD nonn,easy AUTHOR fink(AT)cadvision.com (A.R.FINK) STATUS approved

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Last modified January 18 20:57 EST 2019. Contains 319282 sequences. (Running on oeis4.)