This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A287919 #22 Oct 31 2023 17:38:31 %S A287919 2,3,5,5,8,13,7,12,20,33,11,18,30,50,83,13,24,42,72,122,205,17,30,54, %T A287919 96,168,290,495,19,36,66,120,216,384,674,1169,23,42,78,144,264,480, %U A287919 864,1538,2707,29,52,94,172,316,580,1060,1924,3462,6169 %N A287919 Square array T(0,n) = prime(n) and T(m+1,n) = T(m,n) + T(m,n+1), m >= 0, n >= 1, read by falling antidiagonals. %H A287919 Seiichi Manyama, <a href="/A287919/b287919.txt">Antidiagonals n = 0..139, flattened</a> %e A287919 The array starts: %e A287919 [0] 2 3 5 7 11 13 17 19 23 29 ... (A000040) %e A287919 [1] 5 8 12 18 24 30 36 42 52 60 ... (A001043) %e A287919 [2] 13 20 30 42 54 66 78 94 112 128 ... (A096277) %e A287919 [3] 33 50 72 96 120 144 172 206 240 274 ... (A096278) %e A287919 [4] 83 122 168 216 264 316 378 446 514 582 ... (A096279) %e A287919 [5] 205 290 384 480 580 694 824 960 1096 1226 ... %e A287919 [6] 495 674 864 1060 1274 1518 1784 2056 2322 2570 ... %e A287919 [7] 1169 1538 1924 2334 2792 3302 3840 4378 4892 5380 ... %e A287919 ... %e A287919 First column is A007443: binomial transform of primes. %e A287919 Second column is A178167: binomial transform of odd primes. %t A287919 A287919list[dmax_]:=With[{a=Reverse[NestList[ListConvolve[{1,1},#]&,Prime[Range[dmax]],dmax-1]]},Array[Reverse[Diagonal[a,#]]&,dmax,1-dmax]]; %t A287919 A287919list[10] (* Generates 10 antidiagonals *) (* _Paolo Xausa_, Oct 31 2023 *) %o A287919 (PARI) A287919(m,n)=sum(k=0,m,prime(n+k)*binomial(m,k)) %o A287919 /* read by antidiagonals */ for(m=0,13,for(n=0,m,print1(A287919(n,m-n+1)","))) %Y A287919 Rows and columns include A001043, A096277-A096279, A007443, A178167. %K A287919 nonn,easy,tabl %O A287919 0,1 %A A287919 _M. F. Hasler_, Jun 02 2017