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 A090897 Next n digits of Pi. 7
 3, 14, 159, 2653, 58979, 323846, 2643383, 27950288, 419716939, 9375105820, 97494459230, 781640628620, 8998628034825, 34211706798214, 808651328230664, 7093844609550582, 23172535940812848, 111745028410270193, 8521105559644622948, 95493038196442881097 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS It seems that all terms have at least one prime factor that does not appear in the combined list of prime factors of the preceding terms of the sequence. - Mario Cortés, Aug 20 2020 [Checked up to n=65. - Michel Marcus, Aug 21 2020] LINKS Michel Marcus, Table of n, a(n) for n = 1..100 FORMULA a(n) = floor( Pi * 10^(n*(n+1)/2-1) ) mod (10^n). - Carl R. White, Aug 13 2010 EXAMPLE a(3) = 159 because after the first and the first two digits of Pi the next three are 159. MAPLE Partitioner := proc(cons, len) local i, R, spl; R := []; i:=0; spl := L -> [seq([seq(L[i], i=1 + n*(n+1)/2..(n+1)*(n+2)/2)], n=0..len)]: ListTools:-Reverse(convert(floor(cons*10^((len+1)*(len+2)/2)), base, 10)): map(`@`(parse, cat, op), spl(%)) end: aList := -> Partitioner(Pi, 20); aList(20); # Peter Luschny, Aug 22 2020 MATHEMATICA With[{pi=RealDigits[Pi, 10, 500][[1]]}, FromDigits/@Table[Take[pi, {n (n-1)/2+1, (n(n+1))/2}], {n, 25}]] (* Harvey P. Dale, Dec 24 2011 *) PROG (PARI) lista(nn) = {my(nd = 5+nn*(nn+1)/2); default(realprecision, nd); my(vd = digits(floor(Pi*10^nd))); my(pos = 1); my(vr = vector(nn)); for (n=1, nn, vr[n] = fromdigits(vector(n, k, vd[k+ pos-1])); pos += n; ); vr; } \\ Michel Marcus, Aug 21 2020 CROSSREFS Cf. A000796 (Pi), A016062, A081368. Sequence in context: A330603 A261006 A185238 * A120459 A272368 A108798 Adjacent sequences:  A090894 A090895 A090896 * A090898 A090899 A090900 KEYWORD easy,nonn,base AUTHOR Michael Joseph Halm, Feb 26 2004 STATUS approved

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Last modified April 20 15:27 EDT 2021. Contains 343135 sequences. (Running on oeis4.)