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 A154587 Numbers that can be expressed both as the sum of first prime numbers and as the sum of first nonprime numbers. 4
 0, 5, 28, 71208, 74139, 9260197734, 12374540078, 7574780746329, 11101148723618, 102581905748236, 3325997869054417, 2886018916559052244845, 46437379006448216748610, 120197329614203475099994 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Is this sequence finite? Intersection of A007504 and A053767 generates A294174. - R. J. Mathar, Jan 17 2009 Heuristically, the sequence is infinite with about 2 sqrt(log x) members up to x. - Charles R Greathouse IV, Aug 14 2013 LINKS Giovanni Resta, C program EXAMPLE 5 = 2+3 = 1+4. 28 = 2+3+5+7+11 = 1+4+6+8+9. MAPLE P:=proc(q) local a, b, c, d, n; a:=0; b:=0; c:=0; d:=0; print(a); for n from 1 to q do b:=nextprime(b); a:=a+b; while c

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Last modified September 26 23:42 EDT 2021. Contains 347673 sequences. (Running on oeis4.)