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 A138323 a(n) = Sum_{k = 1..n} prime(k)^prime(k + 1). 1
 8, 251, 78376, 1977405119, 34524689549050, 8650450444070886983, 239081086135595395734136, 257829867026393862843621801395 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..8. EXAMPLE 2^3=8 2^3+3^5=8+243=251 2^3+3^5+5^7=8+243+78125=78376 MATHEMATICA P3[n_] := Sum[Prime[i]^Prime[i + 1], {i, 1, n}]; Table[P3[n], {n, 1, 8}] PROG (PARI) a(n) = sum(k=1, n, prime(k)^prime(k+1)); \\ Michel Marcus, Jan 25 2016 CROSSREFS Cf. A051674, A053089, A074745. Sequence in context: A317519 A300202 A347107 * A214817 A303415 A301401 Adjacent sequences: A138320 A138321 A138322 * A138324 A138325 A138326 KEYWORD nonn AUTHOR Vladimir Joseph Stephan Orlovsky, May 07 2008 STATUS approved

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Last modified July 21 12:25 EDT 2024. Contains 374472 sequences. (Running on oeis4.)